FUD Zilla claims some cheaper Radeon HD 4000 series graphics cards will be released in September:
RV730XT will be faster than Radeon 3650 and it will slowly replace this mainstream card on the market. Both RV730 and RV710 chips are expected in September time. R730 cards should sell between $129 and $149.
RV710 is a replacement for Radeon 3450 and this new card should sell for around $99. Once these cards comes in the game, ATI sill slowly start phasing out Radeon 36x0 and Radeon 34x0, but this happens in September.